Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. An apparatus for wireless communications, comprising: a first interface configured to output at least one first frame for transmission to solicit channel state information (CSI) feedback from each of one or more first wireless nodes associated with a first basic service set (BSS) and from each of one or more second wireless nodes associated with a second BSS; a second interface configured to obtain the CSI feedback solicited from the first and second wireless nodes; and a processing system configured to generate one or more data frames for the first wireless nodes and to select beamforming vectors for transmitting the data frames, based on at least the CSI feedback solicited from the first wireless nodes and the CSI feedback solicited from the second wireless nodes, wherein the first interface is also configured to output the data frames for beamformed transmission to the first wireless nodes using the selected beamforming vectors.
2. The apparatus of claim 1 , wherein the at least one first frame comprises a sounding frame with one or more training fields for the first wireless nodes and the second wireless nodes to use in generating the solicited CSI feedback.
3. The apparatus of claim 1 , wherein the at least one first frame comprises at least one trigger frame that indicates when the first wireless nodes and the second wireless nodes should send the solicited CSI feedback.
4. The apparatus of claim 1 , wherein the solicited CSI feedback is obtained simultaneously from the first wireless nodes and the second wireless nodes.
5. The apparatus of claim 4 , wherein: the solicited CSI feedback from each of the first wireless nodes and the second wireless nodes is included in a physical layer protocol data unit (PDU) that also includes CSI feedback generated based on a sounding frame transmitted by another apparatus associated with the second BSS; and the processing system is configured to extract the solicited CSI feedback from the PDU and discard the CSI feedback generated based on the sounding frame transmitted by the other apparatus associated with the second BSS.
6. The apparatus of claim 1 , wherein: the solicited CSI feedback is obtained from the first wireless nodes in a first time interval; and the solicited CSI feedback is obtained from the second wireless nodes in a second time interval that does not overlap with the first time interval.
7. The apparatus of claim 6 , wherein: the solicited CSI feedback from the second wireless nodes is obtained in a single protocol data unit (PDU) that also includes CSI feedback intended for another apparatus; the solicited CSI feedback from the first wireless nodes is obtained in another single PDU that also includes CSI feedback intended for the other apparatus; and the processing system is configured to discard the CSI feedback from the second wireless nodes intended for the other apparatus and to discard the CSI feedback from the first wireless nodes intended for the other apparatus.
8. The apparatus of claim 1 , wherein: the at least one first frame comprises a first sounding frame with one or more training fields for the first wireless nodes and the second wireless nodes to use in generating the solicited CSI feedback; and the first sounding frame is output for transmission jointly with a second sound frame from another apparatus associated with the second BSS.
9. The apparatus of claim 1 , further comprising at least one antenna via which the first frame and data frames are output for transmission and via which the CSI feedback from the first wireless nodes and the second wireless nodes is obtained, wherein the apparatus is configured as a wireless device.
10. An apparatus for wireless communications, comprising: a first interface configured to obtain at least one first frame from a first wireless node associated with a first basic service set (BSS) and to obtain at least one second frame from a second wireless node associated with a second BSS, wherein the at least one first frame identifies a plurality of stations (STAs) and a number of transmission streams allocated to each STA of the plurality of STAs for generating channel state information (CSI) feedback; a processing system configured to generate first channel state information (CSI) feedback based on the first frame and to generate second CSI feedback based on the second frame; and a second interface configured to output the first CSI feedback for transmission to the first wireless node and to output the second CSI feedback for transmission to the second wireless node.
This apparatus is designed for wireless communications, specifically addressing the challenge of managing channel state information (CSI) feedback in multi-BSS (Basic Service Set) environments. The apparatus includes interfaces to receive frames from wireless nodes in different BSSs, where these frames identify multiple stations (STAs) and the number of transmission streams allocated to each STA for CSI feedback generation. A processing system generates CSI feedback for each BSS based on the received frames. The apparatus then outputs the CSI feedback to the respective wireless nodes, enabling efficient multi-BSS communication by coordinating CSI feedback across different BSSs. This solution improves wireless communication efficiency by dynamically managing CSI feedback in environments with multiple overlapping BSSs, reducing interference and optimizing resource allocation. The apparatus ensures that each BSS receives accurate and timely CSI feedback, enhancing overall network performance.
11. The apparatus of claim 10 , wherein: the at least one first frame comprises a first sounding frame with one or more first training fields; and the processing system is configured to generate the first CSI feedback based on the one or more first training fields.
12. The apparatus of claim 11 , wherein: the at least one second frame comprises a second sounding frame, obtained simultaneously with the first sounding frame, comprising one or more second training fields; and the processing system is configured to generate the second CSI feedback based on the one or more second training fields.
13. The apparatus of claim 10 , wherein: the at least one first frame comprises at least one trigger frame; and the second interface is configured to output the first CSI feedback for transmission in response to the trigger frame.
14. The apparatus of claim 10 , wherein the first CSI feedback and the second CSI feedback are both output for transmission in a single physical layer protocol data unit (PDU).
15. The apparatus of claim 10 , wherein: the first CSI feedback is output for transmission in a first transmission time interval; and the second CSI feedback is output for transmission in a second transmission time interval.
This invention relates to wireless communication systems, specifically to apparatuses for generating and transmitting channel state information (CSI) feedback in a multi-user multiple-input multiple-output (MU-MIMO) environment. The problem addressed is the need to efficiently transmit CSI feedback from multiple user devices to a base station, ensuring timely and accurate channel state reporting while minimizing overhead and latency. The apparatus includes a processor configured to generate first and second CSI feedback reports based on channel measurements. The first CSI feedback is derived from a first set of channel measurements and is output for transmission in a first transmission time interval (TTI). The second CSI feedback is derived from a second set of channel measurements and is output for transmission in a second TTI, distinct from the first. The apparatus may also include a memory for storing channel state data and a transceiver for transmitting the CSI feedback to a base station. The first and second CSI feedback reports may be generated using different reporting modes, such as wideband or subband reporting, and may be transmitted using different reporting periods or subframe configurations. The apparatus may further include a scheduler to determine the timing and format of the CSI feedback transmissions based on network conditions, user device capabilities, or quality of service requirements. The invention improves spectral efficiency and reduces interference in MU-MIMO systems by enabling flexible and adaptive CSI feedback transmission.
16. The apparatus of claim 15 , wherein: the first CSI feedback is output for transmission in the first transmission time interval via multiple user multiple input multiple output (MU-MIMO) transmission simultaneously with CSI feedback from another apparatus; and the second CSI feedback is output for transmission in the second transmission time interval via MU-MIMO transmission simultaneously with CSI feedback from the other apparatus.
This invention relates to wireless communication systems, specifically improving channel state information (CSI) feedback in multi-user multiple input multiple output (MU-MIMO) environments. The problem addressed is the need for efficient and synchronized CSI feedback transmission from multiple user devices to a base station, ensuring accurate channel estimation while minimizing interference and resource overhead. The apparatus includes a processor and a transceiver configured to generate and transmit two types of CSI feedback: first CSI feedback and second CSI feedback. The first CSI feedback is transmitted in a first transmission time interval (TTI) via MU-MIMO, simultaneously with CSI feedback from another apparatus. Similarly, the second CSI feedback is transmitted in a second TTI, also via MU-MIMO, simultaneously with CSI feedback from the same other apparatus. This synchronized transmission allows multiple devices to send their CSI feedback without collision, improving spectral efficiency and reducing latency. The apparatus may also include a memory storing configuration parameters for the CSI feedback, such as modulation and coding schemes, to optimize transmission reliability. The transceiver handles the actual transmission, ensuring proper timing and coordination with other devices in the MU-MIMO network. This approach enhances system performance by enabling the base station to accurately estimate channels for multiple users while efficiently utilizing available resources.
17. The apparatus of claim 10 , further comprising at least one antenna via which the first frame and the second frame are obtained and via which the first CSI feedback and the second CSI feedback are output for transmission, wherein the apparatus is configured as a wireless device.
18. The apparatus of claim 10 , wherein the at least one second frame identifies the plurality of STAs and the number of transmission streams allocated to each STA of the plurality of STAs for generating the CSI feedback.
19. An apparatus for wireless communications, comprising: a first interface configured to output at least one first frame for transmission to solicit a sounding frame from each of one or more first wireless nodes associated with a first basic service set (BSS) and each of one or more second wireless nodes associated with a second BSS; a second interface configured to obtain the sounding frames from each of the first wireless nodes and the second wireless nodes; and a processing system configured to perform channel estimation for each of the first and second wireless nodes based on the sounding frames; and generate one or more data frames for the first wireless nodes and to select beamforming vectors for transmitting the data frames, based at least on the channel estimation performed for the first and second wireless nodes, wherein the first interface is also configured to output the data frames for beamformed transmission to the first wireless nodes using the selected beamforming vectors.
This apparatus is designed for wireless communications in multi-BSS (Basic Service Set) environments, addressing challenges in beamforming and channel estimation across overlapping or adjacent networks. The system includes interfaces and processing components to manage communications with wireless nodes in both a primary BSS and a secondary BSS. The first interface transmits solicitation frames to request sounding frames from all relevant nodes in both BSSs. The second interface receives these sounding frames, which are used by the processing system to perform channel estimation for each node. The processing system then generates data frames for the primary BSS nodes and selects optimal beamforming vectors based on the channel estimates from both BSSs. The data frames are transmitted using these beamforming vectors to improve signal quality and efficiency in the primary BSS while accounting for interference or coexistence with the secondary BSS. This approach enhances spatial reuse and reliability in dense wireless networks by leveraging multi-BSS channel information for beamforming decisions.
20. The apparatus of claim 19 , wherein the second interface is configured to obtain each of the sounding frames in a separate time interval.
This invention relates to wireless communication systems, specifically to apparatuses for transmitting and receiving sounding frames to assess channel conditions. The problem addressed is the need for efficient and accurate channel state information (CSI) acquisition in wireless networks, particularly in scenarios where multiple sounding frames are transmitted to evaluate different channel conditions over time. The apparatus includes a first interface for transmitting sounding frames and a second interface for receiving the sounding frames. The second interface is configured to obtain each sounding frame in a separate time interval, allowing for sequential or staggered reception of the frames. This ensures that each frame is processed independently, reducing interference and improving the accuracy of channel measurements. The apparatus may also include a processor to analyze the received sounding frames and generate channel state information, which can be used for beamforming, link adaptation, or other optimization techniques in wireless communication. The invention further includes mechanisms for synchronizing the transmission and reception of sounding frames, ensuring that the frames are obtained at the correct intervals. The apparatus may be part of a base station, access point, or user device in a wireless network, supporting various communication standards such as 5G, Wi-Fi, or other advanced wireless technologies. The separate time intervals for obtaining sounding frames help mitigate interference and improve the reliability of channel assessments, enhancing overall network performance.
21. The apparatus of claim 19 , wherein: the second interface is configured to obtain the sounding frames simultaneously; each sounding frame comprises at least one training field; and the processing system is configured to demultiplex training fields from the each of the sounding frames prior to performing the channel estimation.
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February 2, 2021
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